Thirds to colwert k



(No Model.)

C. 1-1. KEENEY.

SELF CLUSING GAS BURNER.

Patented May 1 2, 1891.

UNITED STATES PATENT OEEIcE.

CHARLES H. KEENEY, OF MILWAUKEE, VISOONSIN, ASSIGNOR OF TWO- THIRDS TO COLWERT K. PIER AND ISIDOR LEISER, BOTH OF SAME PLACE.

SELF-CLOSING GAS-BURNER.

SPECIFICATION forming part of Letters Patent No. 452,140, dated May 12, 1891.

Application iiled J' une LL1890. Serial No. 354,246. (No model.)

To all whom it may concern:

Be it known that I, CHARLES H. KEENEY, of Milwaukee, in the county of Milwaukee and State of Wisconsin,have inventeda new and useful Improvement in Self-Olosin g Gas-Burners, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specication.

My invention relates to improvements in devices construct-ed and arranged for automatically closing the pipe and cutting off the supply of gas from a burner such as is commonly used for lighting purposes when the light has been extinguished. My device will close the gas-pipe when the heat of the burning gas ceases to exist, whether the flow of gas has or has notbeen otherwise stopped, though the particular object of my device is to automatically close the pipe, and thereby stop the flow of gas when the'light has beenaccidentally extinguished without the supply of gas being otherwise stopped.

' In the drawings, Figure 1 is a vertical section of a gas-burner on line l l of Fig. 2 with my automatic device connected thereto. Fig. 2 is a central vertical section of the tube and tip of a gas-burner with my automatic device shown in connection therewith. Fig. 3 is an end view of the valve for closing, the pipe, looking at it toward the left of Fig. l.' Fig. 4 is an elevation of a gas-burner, parts being broken away for showing the interior construction, with which a modified form of my device is shown. Fig. 5 is adetail of the modi- Iied form of device shown in Fig. 4.

A is the pipe for supplying the gas to the burner.

B is the burner-tube, and O is a coupling by which the burner-tube B is secured to the gas-pipe A.

D is the burnertip, which is commonly made of clay or earth material properly formed and baked. Theburner-tip D in this form of device is provided with a slit E for discharging the gas therethrough, at which place the gas is lighted and burned in the method in ,OIIllIlOIl use.

The forms of burners shown in the illustration are such as are in common use, and I have selected this form of burner for the illustration of my device and its operation; but the device can be readily attached to other forms of burners with such slight modification* in its construction as would be suggested to any mechanic, and could be readily made.

In the construction of my device a valvechamber F is formed,preferably, in the coupling C, which has a valve-seat G, preferably beveled for convenience of construction and to furnish greater surface for the bearing of the Valve. A valve I-I in the chamber F is fitted tothe valve-seat G, and is adaptedto close the passage through the coupling. provided with laterally-projecting guides I I, which bear loosely against the sides of the chamber F and retain the valve in position as it travels from and toward the valve-seat G. The valve II is less in diameter than the diameter of the chamber F, whereby openings K K are provided for the passage of gas through the pipe A and coupling C into the burner-tube B at the sides of the valve when it is forced away from the valve-seat G, and occupies the position in the chamber F shown in Fig. 1. The valve is provided with a stern L, which passes centrally through vthe valve, and is provided with a screw-thread and nut M, turning thereon, whereby the.

length of the stem may be increased or diminished as desired for adj ustingfit properly with refe-rence to other part-s ofthe device.

The stem L is provided at its front end with an eye N.

The valve H is opened and closed by the action of a metal'thermostat constructed and arranged substantiallyy as follows: A metal wire or strip O extends from the top of the burner-tip D down into and through the passage in the burner-tube B into the passage Vthrough the coupling O, where it enters the eye N of the stem L of the valve. Another strip of metal P is placed against and secured rigidly to the strip O throughout a considerable portion of its length. These two strips of metal are secured ixcdly to the wall of the burner-tube B at a distance from the stem L and preferably at a point R, where the strip l? lpasses from the outside into the burner- The valve isl The two strips of metal O and?, being` thus secured Iixedly to the burner-tube at a distance from the stein L, are secured also to the stem L conveniently by inserting the projeeting end S into the eye N. This form of construction provides for inserting and removing the burner-tube B from the socket C readily by rotating it on its screw-thread thei'ein. The strip O is formed of metal hav ing great expansibility under heat, preferably of brass, copper, or similar metal, and the strip I is constructed of metal having less expansibility under the same degree of heat, preferably of steel or iron or similar metal. The strip O is also preferably made bit urcate at its upper ends, its two arms T T being constructed and arranged to have position on each side of and just above the slit E of the burnertp,so that these arms TT will beiiear to or in contact with the combustion of the gas when it is lighted and burning at the slit in the tip. It the burner-tubeBis constructed of metal that unfavorably aifects the theriiiostat, an earthen plug U may be inserted in the wall of the biirnei D, and the strip O may be cairied through the wall in the plug', and the two strips O and l) may be secured directly to the plug, which in turn is fixed in the wall of the burner. The result of this forni of construction of the thermostat is that when heat is applied by the burning of the gas at the tip D to the arms T T the heat will be therefrom transinit-ted to the part of the strip O that is alongside of and opposite the strip P, and as the strip O has greater eXpansibility than the strip Pit will curve inwardly and force the stein L and valve II rearwardly away from thevalve-seat, so that the gas may freely flow around the valve to the burner, and as long as heat continues to act on the strip O the valve 1I will be held open; but when the combustion ceases at the tip D the strip O will cool and contract, thereby straightening the thermostat and closing the valve II, thus stopping the iiow of gas through the burner. Then the gas is turned onto the burner by opening' the stop-cock in the pipe A, the match or taper used for lighting the gas must be held for a moment against ornear to the arms T T ot' the strip O to sufficiently heat the strip to cause such a movement of the thermostat as to properly open the valve H, whereupon the gas will flow, and, being lighted, willby its combustion and the action of the thermostat hold the valve open.

In the modified form of device shown in Figs. 4c and 5 a short lever V is pivoted niedially in the coupling C conveniently by journals V. The lower arm of this lever is inserted in the eye N and the upper arm is connected to the lower end of the strips O and P. In this modified forni of device the strips O and P are arranged in the reverse position to that of the strips O and P shown in the other form of device, so that by the greater expansion of the strip O the top ot' the lever V will be thrown outwardly, thereby forcing the lower end of the lever and the valve l-l rearwardly away from its scat. In this forni of device the strip O is shown as a round wire, which may be used, if desired, and its upper end is carried over the burner-tip D at its side or at right angles to the slit E; but in this ease the end of the strip O is extended upwardly a little, so as to be suflicientlywithin the field of the combustion above the slit.

What I claim as new, and desire to secure by Letters Patent, is-

l. In a device forautomatically closing the passage in a gas-burner, a thermostat consisting of a strip of metal having considei'able expansibility under the action of heat, one end of which is located in or near the point ot combustion, and another strip of metal of less expansibility under the action of heat placed alongside and secured to the first strip of metal for a considerable distance, both which strips at their free ends are connected within the passage in the burner to a movable valve, and at a distance therefrom are secured rigidly to the burner-tube, substantially as described.

2. The combination, with a gas-burner tube, of a thermostat constructed of two strips of inetal of different expansib'ility under heat, the strip of metal of lesser expansibility being located entirely within the burner-tiibe and the other strip within the tube being located alongside of and secured to the strip of lesser expansibility, both strips being secured to the tube at a distance from their free ends, the strip of greater expansibility passing through the wall of the burner-tube and extending on the outside of the tube into the field of combustion above the burner-top, and a laterally-movable valve located in the passage for the gas and connected to the inner free end ol' the thermostat, but so as to be moved by the action of the thermostat, substantially as described.

3. The combination,withagas-burnertube, of a therinonstat consisting of two strips ot' metal of greater and lesser expansibility placed alongside and secured together, being at a distance from their free ends fixed to the burner-tube, the strip ot' greater expansibility being continued into the field of combustion, a laterally-moving valve located in a chainbcr formed at the side of: the burner-tube, the valve being arranged to seat itself in the direction of the fiow of gas, and a ineaus of positive connection of the valve with the free end of the thermostat, whereby the valve is moved toward and from its seat by the inotions of the free end of the thermostat, substantially as described.

In testimony whereof I aliix my signatu ic in presence of two Witnesses.

CHARLES H. KEENEY.

Witnesses:

C. T. BENEDICT, ANNA FAUST,

IOO

IIO 

